Show whitespace

custom/4coder_config.cpp

@@ -1639,6 +1639,21 @@ CUSTOM_DOC("Parse the current buffer as a theme file and add the theme to the th
         String_Const_u8 error_text = config_stringize_errors(app, scratch, config);
         print_message(app, error_text);
         
+        u64 problem_score = 0;
+        if (color_table.count < defcolor_line_numbers_text){
+            problem_score = defcolor_line_numbers_text - color_table.count;
+        }
+        for (u32 i = 0; i < color_table.count; i += 1){
+            if (color_table.arrays[i].count == 0){
+                problem_score += 1;
+            }
+        }
+        
+        if (error_text.size > 0 || problem_score >= 10){
+            String_Const_u8 string = push_u8_stringf(scratch, "There appears to be a problem parsing %.*s; no theme change applied\n", string_expand(file_name));
+            print_message(app, string);
+        }
+        else{
             String_Const_u8 name = string_front_of_path(file_name);
             if (string_match(string_postfix(name, 7), string_u8_litexpr(".4coder"))){
                 name = string_chop(name, 7);
@@ -1650,6 +1665,7 @@ CUSTOM_DOC("Parse the current buffer as a theme file and add the theme to the th
                 active_color_table = node->table;
             }
         }
+    }
 }
 
 function void

custom/4coder_default_hooks.cpp

@@ -288,6 +288,13 @@ default_render_buffer(Application_Links *app, View_ID view_id, Face_ID face_id,
     b32 is_active_view = (active_view == view_id);
     Rect_f32 prev_clip = draw_set_clip(app, rect);
     
+    Range_i64 visible_range = text_layout_get_visible_range(app, text_layout_id);
+    
+    // NOTE(allen): Cursor shape
+    Face_Metrics metrics = get_face_metrics(app, face_id);
+    f32 cursor_roundness = (metrics.normal_advance*0.5f)*0.9f;
+    f32 mark_thickness = 2.f;
+    
     // NOTE(allen): Token colorizing
     Token_Array token_array = get_token_array_from_buffer(app, buffer);
     if (token_array.tokens != 0){
@@ -304,7 +311,6 @@ default_render_buffer(Application_Links *app, View_ID view_id, Face_ID face_id,
         }
     }
     else{
-        Range_i64 visible_range = text_layout_get_visible_range(app, text_layout_id);
         paint_text_color_fcolor(app, text_layout_id, visible_range, fcolor_id(defcolor_text_default));
     }
     
@@ -349,10 +355,17 @@ default_render_buffer(Application_Links *app, View_ID view_id, Face_ID face_id,
                             fcolor_id(defcolor_highlight_cursor_line));
     }
     
-    // NOTE(allen): Cursor shape
+    // NOTE(allen): Whitespace highlight
-    Face_Metrics metrics = get_face_metrics(app, face_id);
+    b64 show_whitespace = false;
-    f32 cursor_roundness = (metrics.normal_advance*0.5f)*0.9f;
+    view_get_setting(app, view_id, ViewSetting_ShowWhitespace, &show_whitespace);
-    f32 mark_thickness = 2.f;
+    if (show_whitespace){
+        if (token_array.tokens == 0){
+            draw_whitespace_highlight(app, buffer, text_layout_id, cursor_roundness);
+        }
+        else{
+            draw_whitespace_highlight(app, text_layout_id, &token_array, cursor_roundness);
+        }
+    }
     
     // NOTE(allen): Cursor
     switch (fcoder_mode){

custom/4coder_draw.cpp

@@ -520,6 +520,51 @@ draw_cpp_token_colors(Application_Links *app, Text_Layout_ID text_layout_id, Tok
     }
 }
 
+function void
+draw_whitespace_highlight(Application_Links *app, Text_Layout_ID text_layout_id, Token_Array *array, f32 roundness){
+    Range_i64 visible_range = text_layout_get_visible_range(app, text_layout_id);
+    i64 first_index = token_index_from_pos(array, visible_range.first);
+    Token_Iterator_Array it = token_iterator_index(0, array, first_index);
+    for (;;){
+        Token *token = token_it_read(&it);
+        if (token->pos >= visible_range.one_past_last){
+            break;
+        }
+        if (token->kind == TokenBaseKind_Whitespace){
+            Range_i64 range = Ii64(token);
+            draw_character_block(app, text_layout_id, range, roundness,
+                                 fcolor_id(defcolor_highlight_white));
+        }
+        if (!token_it_inc_all(&it)){
+            break;
+        }
+    }
+}
+
+function void
+draw_whitespace_highlight(Application_Links *app, Buffer_ID buffer, Text_Layout_ID text_layout_id, f32 roundness){
+    Range_i64 visible_range = text_layout_get_visible_range(app, text_layout_id);
+    for (i64 i = visible_range.first; i < visible_range.one_past_last;){
+        u8 c = buffer_get_char(app, buffer, i);
+        if (character_is_whitespace(c)){
+            i64 s = i;
+            i += 1;
+            for (; i < visible_range.one_past_last; i += 1){
+                c = buffer_get_char(app, buffer, i);
+                if (!character_is_whitespace(c)){
+                    break;
+                }
+            }
+            Range_i64 range = Ii64(s, i);
+            draw_character_block(app, text_layout_id, range, roundness,
+                                 fcolor_id(defcolor_highlight_white));
+        }
+        else{
+            i += 1;
+        }
+    }
+}
+
 function void
 draw_comment_highlights(Application_Links *app, Buffer_ID buffer, Text_Layout_ID text_layout_id,
                         Token_Array *array, Comment_Highlight_Pair *pairs, i32 pair_count){

ship_files/changes.txt

@@ -4,9 +4,11 @@
  + clipboard is only read when the requests to, or when the collect-all mode is started via the command 'begin_clipboard_collection_mode'
  + 'clear_clipboard' command
  + in config.4coder the variable virtual_whitespace_regular_indent determines the number of space-widths to use as the regular indentation in a virtual whitespace layout
+ + show whitespace mode implemented in 'default_render_buffer'
  + Fix: tabs are measured with the correct amount of width for the user's settings
  + Fix: virtual whitespace toggling works when the config initially diabled virtual whitespace
  + Fix: never miss the most recent post to the clipboard on windows
+ + Fix: command `load_theme_current_buffer` gaurds against destroying the active color palette when bad files are loaded
 
 4.1.3
  + Unkillable buffer setting